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Finding the Fourth Proportional to 8,636.99, 12,933.62 and 5,340.09

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Solution

The fourth proportional to 8,636.99, 12,933.62 and 5,340.09 is: 7,996.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,636.99 : 12,933.62 = 5,340.09 : x
  2. Step 2: Convert to fraction form
    8,636.99/12,933.62 = 5,340.09/x
  3. Step 3: Cross multiply
    8,636.99x = 12,933.62 × 5,340.09
  4. Step 4: Simplify right side
    8,636.99x = 69,066,668.13
  5. Step 5: Solve for x
    x = 69,066,668.13/8,636.99
  6. Step 6: Final answer
    x = 7,996.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.